Its default is F9 alone, it is keyboard-only (mouse buttons and the
wheel are errors), serializes and imports like the other utility
actions, warns when another action takes F9 until it moves off, and no
other built-in input uses F9.
A rebindable keyboard action, F9 by default, that asks for the
controller status panel. F9 is the first free function key: F7, F10,
F11 and F12 are bound by default and no default keyboard-to-pad binding
uses it. Like ToggleFullscreen, TogglePerformanceOverlay and Screenshot
it accepts only keyboard keys, fires once per press (not on key repeat)
and does not press any pad button.
The input mapper's catalogue gets the action, its F9 default and its
keyboard-only restriction, and its existing source-contract tests list
it, since they compare the actions, restrictions and built-in bindings
with the native files.
MarcZX10